Directions from INN:
The first option is to take a direct bus from the airport to Bolzano.
You can find the timetable of the bus here.
The second option is to take the city bus to the Innsbruck railway station and then
take the train to Bolzano. You can find information about the timetable of
the trains on the websites of
OBB and
Trenitalia.

Directions from VRN:
The first option is to take a direct bus from the airport to Bolzano.
You can find the timetable of the bus here.
The second option is to take the Aerobus
to the Verona Porta Nuova railway station and then take the train to Bolzano.
You can find information about the timetable of the trains on the website of
Trenitalia.

Directions from BGY:
The easiest way is to take a direct bus from the airport to Bolzano. You can use either
AltoAdigeBus or Flixbus. The second option is to take
the bus to the Bergamo railway station and then take the train to Bolzano. You
can find information about the timetable of the trains on the website of
Trenitalia. Another option is to take
the Autostradale bus to Brescia
and take the train to Bolzano from there.

Directions from BLQ:
Take the Aerobus to the Bologna Centrale
railway station and then take the train to Bolzano. You
can find information about the timetable of the trains on the website of
Trenitalia.

Directions from VCE:
Take the bus to Venezia Mestre railway station and the take the train to Bolzano.
You can find information about the timetable of the trains on the website of
Trenitalia.

Directions from LIN and MXP:
Take one of the buses to the Milano Centrale railway station and then take the train
to Bolzano. You can find information about the timetable of the trains on the website of
Trenitalia.

Directions from MUC:
The easiest way is to take a direct bus from the airport to Bolzano. You can use either
AltoAdigeBus or Flixbus. The second option is to take
the S-Bahn to München Hbf and then take either Flixbus or the train to
Bolzano. You can find the timetable of the trains on the websites of
OBB,
Trenitalia and
DB.